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Firm News:

• O’Neil Cannon Adds Four Shareholders
• Grant Killoran Elected Wisconsin State Bar Delegate to the American Bar Association
• O’Neil Cannon Attorneys Recognized as Benchmark Litigation Stars
• Attorney Greg Lyons Recognized as a 2025 Notable Litigator and Trial Attorney by BizTimes Milwaukee

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A number of former O’Neil Cannon attorneys have devoted a substantial portion of their professional careers to public service after leaving the firm. Those attorneys include the following:

Honorable Thomas Barrett. The Honorable Thomas Barrett served in the Wisconsin State Assembly from 1984 to 1989, the Wisconsin Senate from 1989 to 1993, and the U.S. House of Representatives from 1993 to 2003. In 2004, Barrett became mayor of the City of Milwaukee and remained in that position until 2021, following which he was appointed by the President of the United States to serve as the U.S. Ambassador to Luxembourg from 2022 to 2025. Barrett joined O’Neil Cannon after clerking for a federal judge following graduation from law school and practiced on the Litigation Team.

Justice Annette Ziegler. Justice Annette Ziegler served as a judge of the Washington County Circuit Court from 1997 to 2007 and has served as a justice of the Wisconsin Supreme Court from 2007 to the present. She served as the Chief Justice of the Wisconsin Supreme Court from 2021 to 2025. Justice Ziegler joined O’Neil Cannon following graduation from law school and practiced on the Litigation Team.

Honorable David Borowski. The Honorable David Borowski has served as a judge of the Milwaukee County Circuit Court since 2003. Judge Borowski joined O’Neil Cannon following graduation from law school and practiced on the Litigation Team.

Honorable Laura Lavey. The Honorable Laura Lavey has served as a judge of the Fond du Lac County Circuit Court since 2022. Judge Lavey joined O’Neil Cannon following graduation from law school and practiced on the Litigation Team.

O’Neil Cannon congratulates these four esteemed former colleagues and thanks them for all of their years of public service. O’Neil Cannon is proud to call them alumni of the firm.

O’Neil Cannon is pleased to announce that Christina Ruud, Cate Heerey, Nancy Wilson, and Max Stephenson were elected as shareholders of the firm.

Each attorney has built a strong practice within their respective areas. Ruud advises clients on commercial real estate transactions and development matters. Heerey counsels businesses and owners on a range of corporate and transactional issues. Wilson focuses on tax and estate planning for individuals, families, and business owners. Stephenson represents clients in family law matters, advising individuals and families on a range of domestic relations issues.

Please join us in congratulating them on this well-deserved achievement.

O’Neil Cannon is pleased to announce that Sabrina Dornan has joined the firm. Dornan focuses her practice on estate planning, trust administration, probate, and business succession matters, assisting individuals and families in developing comprehensive estate plans and guiding clients through probate administration. She is licensed to practice law in Wisconsin and Illinois.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm focused on meeting the diverse legal needs of businesses and their owners. Our experienced attorneys work with businesses at every stage of the business life cycle, helping them start, grow, and successfully transition. We also represent businesses and individuals in a wide range of other matters, including litigation, tax and estate planning, and family law. For more information about the services we provide, please visit our website.

Grant Killoran was recently elected to serve as the Wisconsin State Delegate to the American Bar Association.

State Delegates are elected by the ABA members in a given state and maintain relationships between state and local bars and the ABA. State Delegates serve as members of the ABA’s Nominating Committee and vote to elect ABA officers and most members of the ABA Board of Governors. Additionally, State Delegates serve as Chair of their state’s Delegation to the ABA House of Delegates, the Association’s governing and policy-making body structured to reflect the legal profession in the United States.

Grant previously served as a member of the ABA Board of Governors from 2021-2024 and as a member of the ABA House of Delegates from 1997-1999, 2003-2009, and 2014-2024.

Grant is a shareholder and past Chair of O’Neil Cannon’s Litigation Practice Group. He has diverse trial experience, focusing on complex business and health care disputes.

O’Neil Cannon is proud to announce that attorneys Doug Dehler, Grant Killoran, Dean Laing, Greg Lyons, Patrick McBride, Joe Newbold, Steve Slawinski, and Christa Wittenberg have been selected as Benchmark Litigation Stars in the 19th edition of Benchmark Litigation.

Based on extensive research and feedback from peers and clients, Benchmark Litigation Stars are recognized as the nation’s most respected and accomplished litigation practitioners. Inclusion as a Benchmark Litigation Star reflects each attorney’s outstanding reputation, deep litigation experience, and consistent success on behalf of clients.

Benchmark Litigation is a leading guide to the world’s foremost litigation firms and lawyers, widely relied upon by in-house counsel and legal professionals nationwide.

O’Neil Cannon is pleased to welcome Max Stephenson to its Family Law practice group. Stephenson helps clients navigate the legal and emotional complexities of family transitions, including divorce, child custody, paternity, post-judgment modifications, guardianships, and injunctions. Known for his approachable style and practical, personalized strategies, he also brings deep experience in LGBTQ+ family law. His commitment to clients and the community is reflected in his leadership and volunteer work with organizations such as the American Cancer Society and the LGBT Chamber of Wisconsin.

O’Neil Cannon, founded in Milwaukee in 1973, is a full-service law firm dedicated to serving the wide-ranging needs of businesses and their owners. We represent corporations, institutions, partnerships, and closely held companies at every stage of the business life cycle, helping them start, grow, and transition from one generation to the next. In addition to our strong focus on business law and civil litigation, we assist business owners with their personal legal needs, including tax and estate planning and family law.